Lens driving device and electronic equipment

A lens driving device comprising:

• a motor;
• a lead screw connected to the motor for undergoing rotation about an axial line of the lead screw;
• a nut threadingly engaged with the lead screw for undergoing rotational and back and forth movement along the axial line of the lead screw;
• a casing detachably mounted to a plate and housing the lead screw and the nut;
• rotation regulation means for regulating the rotation of the nut so that when the lead screw rotates about the axial line, the nut does not rotate in accordance with rotation of the lead screw, the rotation regulation means comprising a protruding portion protruding outwardly from an outer peripheral surface of the nut and a fitting groove formed in the casing in the direction of the axial line of the lead screw for receiving the protruding portion;
• and
• a lens frame having a lens holding portion for holding a lens and mounted to undergo movement in the direction of the axial line of the lead screw in accordance with back and forth movement of the nut to adjust a position of the lens,
• wherein at least one of the casing and the protruding portion of the nut has a tapered surface formed so as to forcibly guide the protruding portion toward the fitting groove so that the fitting groove gradually receives the protruding portion when the casing is detachably mounted to the plate.

A lens driving device comprising:

• a motor;
• a lead screw connected to the motor for undergoing rotation about an axial line of the lead screw;
• a nut threadingly engaged with the lead screw for undergoing rotational and back and forth movement along the axial line of the lead screw;
• a casing housing the lead screw and the nut;
• rotation regulation means for regulating the rotation of the nut so that when the lead screw rotates about the axial line, the nut does not rotate in accordance with rotation of the lead screw, the rotation regulation means comprising a protruding portion protruding outwardly from an outer peripheral surface of the nut and a fitting groove formed in the casing in the direction of the axial line of the lead screw for receiving the protruding portion;
• and
• a lens frame having a lens holding portion for holding a lens and mounted to undergo movement in the direction of the axial line of the lead screw in accordance with back and forth movement of the nut to adjust a position of the lens;
• wherein the motor and casing are mounted to a plate;
• and
• wherein a portion of the nut opposite to the protruding portion has a pair of convex portions configured to protrude toward the plate so that when the nut is threadingly engaged with the lead screw, the convex portions come into contact with the plate to set a rotation of the nut within a predetermined rotational range.